Long-slit spectroscopy of the planetary nebula NGC 6543 - Collimated bipolar ejections from a precessing central source?

Details Long-slit spectroscopy of the planetary nebula NGC 6543 - Collimated bipolar ejections from a precessing central source? Long-slit spectroscopy of the planetary nebula NGC 6543 - Collimated bipolar ejections from a precessing central source?

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...260..397m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 260, no. 1-2, p. 397-410.

Astronomy and Astrophysics

Astrophysics

76

Astronomical Spectroscopy, Interstellar Matter, Planetary Nebulae, Stellar Mass Ejection, Stellar Motions, Stellar Winds

Scientific paper

The study presents long-slit spectra of the planetary nebula NGC 6543, obtained at high and moderate spectral and high spatial resolution. The spatial and kinematic properties of the various components identified in the nebula are studied in great detail, and a spatial-kinematical model which can account for the observed velocity field is established. The velocity field of NGC 6543 shows the existence of two concentric ellipsoidal shells in the nebula. The two shells likely represent the inner and outer surface layers of a geometrically 'Thick Ellipsoid' (TE) which constitutes the basic structure of NGC 6543. The equatorial zone of the TE is characterized by a bright ring. The equatorial expansion velocity of the TE increases from about 16 to about 28 km/s, at the inner and outer shell, respectively. The polar expansion velocities are larger by a factor of about 1.8 than the equatorial expansion velocities.

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